Finding the Fourth Proportional to 10,209.27, 15,322.29 and 5,280.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,209.27 : 15,322.29 = 5,280.42 : x
2. Step 2: Convert to fraction form
   10,209.27/15,322.29 = 5,280.42/x
3. Step 3: Cross multiply
   10,209.27x = 15,322.29 × 5,280.42
4. Step 4: Simplify right side
   10,209.27x = 80,908,126.56
5. Step 5: Solve for x
   x = 80,908,126.56/10,209.27
6. Step 6: Final answer
   x = 7,924.97